field.h

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/*
 * Copyright (c) 1991 Stanford University
 * Copyright (c) 1991 Silicon Graphics, Inc.
 *
 * Permission to use, copy, modify, distribute, and sell this software and
 * its documentation for any purpose is hereby granted without fee, provided
 * that (i) the above copyright notices and this permission notice appear in
 * all copies of the software and related documentation, and (ii) the names of
 * Stanford and Silicon Graphics may not be used in any advertising or
 * publicity relating to the software without the specific, prior written
 * permission of Stanford and Silicon Graphics.
 *
 * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
 *
 * IN NO EVENT SHALL STANFORD OR SILICON GRAPHICS BE LIABLE FOR
 * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
 * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
 * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
 * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
 * OF THIS SOFTWARE.
 */
 
/*
 * FieldSEditor -- simple editor for text fields
 */
 
#pragma once
 
#include <InterViews/input.h>
#include <InterViews/resource.h>
 
class FieldSEditor;
class FieldSEditorImpl;
class String;
class Style;
class WidgetKit;
 
class FieldSEditorAction: public Resource {
  protected:
    FieldSEditorAction();
    virtual ~FieldSEditorAction();
 
  public:
    virtual void accept(FieldSEditor*);
    virtual void cancel(FieldSEditor*);
};
 
#if defined(__STDC__) || defined(__ANSI_CPP__)
#define __FieldSEditorCallback(T)       T##_FieldSEditorCallback
#define FieldSEditorCallback(T)         __FieldSEditorCallback(T)
#define __FieldSEditorMemberFunction(T) T##_FieldSEditorMemberFunction
#define FieldSEditorMemberFunction(T)   __FieldSEditorMemberFunction(T)
#else
#define __FieldSEditorCallback(T)       T /**/ _FieldSEditorCallback
#define FieldSEditorCallback(T)         __FieldSEditorCallback(T)
#define __FieldSEditorMemberFunction(T) T /**/ _FieldSEditorMemberFunction
#define FieldSEditorMemberFunction(T)   __FieldSEditorMemberFunction(T)
#endif
 
#define declareFieldSEditorCallback(T)                                                          \
    typedef void (T::*FieldSEditorMemberFunction(T))(FieldSEditor*);                            \
    class FieldSEditorCallback(T)                                                               \
        : public FieldSEditorAction {                                                           \
      public:                                                                                   \
        FieldSEditorCallback(                                                                   \
            T)(T*, FieldSEditorMemberFunction(T) accept, FieldSEditorMemberFunction(T) cancel); \
        virtual ~FieldSEditorCallback(T)();                                                     \
                                                                                                \
        virtual void accept(FieldSEditor*);                                                     \
        virtual void cancel(FieldSEditor*);                                                     \
                                                                                                \
      private:                                                                                  \
        T* obj_;                                                                                \
        FieldSEditorMemberFunction(T) accept_;                                                  \
        FieldSEditorMemberFunction(T) cancel_;                                                  \
    };
 
#define implementFieldSEditorCallback(T)                                                          \
    FieldSEditorCallback(T)::FieldSEditorCallback(                                                \
        T)(T * obj, FieldSEditorMemberFunction(T) accept, FieldSEditorMemberFunction(T) cancel) { \
        obj_ = obj;                                                                               \
        accept_ = accept;                                                                         \
        cancel_ = cancel;                                                                         \
    }                                                                                             \
                                                                                                  \
    FieldSEditorCallback(T)::~FieldSEditorCallback(T)() {}                                        \
                                                                                                  \
    void FieldSEditorCallback(T)::accept(FieldSEditor* f) {                                       \
        (obj_->*accept_)(f);                                                                      \
    }                                                                                             \
    void FieldSEditorCallback(T)::cancel(FieldSEditor* f) {                                       \
        (obj_->*cancel_)(f);                                                                      \
    }
 
class FieldSEditor: public InputHandler {
  public:
    FieldSEditor(const String& sample, WidgetKit*, Style*, FieldSEditorAction* = NULL);
    virtual ~FieldSEditor();
 
    virtual void undraw();
 
    virtual void press(const Event&);
    virtual void drag(const Event&);
    virtual void release(const Event&);
    virtual void keystroke(const Event&);
    virtual InputHandler* focus_in();
    virtual void focus_out();
 
    virtual void field(const char*);
    virtual void field(const String&);
 
    virtual void select(int pos);
    virtual void select(int left, int right);
 
    virtual void selection(int& start, int& index) const;
 
    virtual void edit();
    virtual void edit(const char*, int left, int right);
    virtual void edit(const String&, int left, int right);
 
    virtual const String* text() const;
 
  private:
    FieldSEditorImpl* impl_;
};